at 4 years

at 4 years when i'm 4 years old为什么加years old 而at the age of 4不加years old 是at about ten years 还是for about ten years it is worth every you pay of love ／i smiled splendidly at that time ／4 years tom()at this school ten years ago One day ashore,ten years at at three years old表达对吗 One day at shore,ten years at sea! at 3 years;in 3 years;every 3 years有什么区别? 有关计算present value的题目Compute the present value of a $100 investment made 6 months,5 years,and 10 years from now at 4 percent interest. it is worth every you pay of love is miled splendidly at that time 4years ago是什么意思 The olympic games will be held in our country in four years' time. in four years 中 in 可换 after?1、……in four years 和……at four years ……after four years 有什么区别?2、表达 4年内 怎么表达呢? His father____________ (teach) at this school since ten years aro She has worked at school s_______ five years ago. cooks who have been at the job many long years. Maybe years later I remained at waiting for I began to learn__a bicycle at seven years old At the age of five years old RT